NGC 6522
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Globular cluster NGC 6522 |
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| Image of the globular cluster NGC 6522 with the Hubble Space Telescope | |
| AladinLite | |
| Constellation | Sagittarius |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 18 h 3 m 34.1 s |
| declination | -30 ° 02 ′ 02 ″ |
| Appearance | |
| Concentration class | VI |
| Brightness (visual) | 9.9 likes |
| Angular expansion | 9.4 ' |
| Physical data | |
| Age | 12 billion years |
| history | |
| discovery | William Herschel |
| Discovery date | June 24, 1784 |
| Catalog names | |
| NGC 6522 • C 1800-300 • GCl 82 • ESO 456-60 / 456-43 • GC 4359 • Bennett 101, HI 49, h 3720, Cl VDBH 256 | |
The globular clusters NGC 6522 and NGC 6528 captured with the 81 cm reflecting telescope of the Mount Lemmon Observatory .
NGC 6522 is the name of a globular cluster in the constellation Sagittarius . The globular cluster is approximately 20,000 light years (6.1 kpc) apart. Like the nearby globular cluster NGC 6528, it is located in the so-called Baade window , in whose direction of view towards the galactic center the view is not obscured by dust from the Milky Way. The globular cluster was discovered on June 24, 1784 by the astronomer William Herschel with an 18.7-inch telescope and the discovery was later recorded in the New General Catalog .
NGC 6522 is possibly the oldest globular star cluster in the Milky Way at 12 billion years old.
Individual evidence
- ↑ NASA / IPAC EXTRAGALACTIC DATABASE
- ↑ a b c SEDS : NGC 6522
- ↑ Seligman
- ^ "VLT-FLAMES Analysis of 8 giants in the Bulge Metal-poor Globular Cluster NGC 6522: Oldest Cluster in the Galaxy?" By B. Barbuy et al. , 2009
- ↑ "The universe's first stars were whirling dervishes" , New Scientist by David Shiga, April 30th 2011, p. 20th
- ↑ Cristina Chiappini, Urs Frischknecht a. a .: Imprints of fast-rotating massive stars in the Galactic Bulge. In: Nature. 472, 2011, pp. 454-457, doi : 10.1038 / nature10000 .